(19)

(11)

EP 3 804 138 A1

(12)

(43) Date of publication: 14.04.2021 Bulletin 2021/15 (21) Application number: 19730883.6 (22) Date of filing: 29.05.2019

(51) International Patent Classification (IPC):  H03K 17/18(2006.01) H03K 17/567(2006.01) H03K 17/58(2006.01) H03K 19/082(2006.01) H02M 1/08(2006.01) H01L 27/06(2006.01) H03K 17/74(2006.01) (86) International application number: PCT/GB2019/051465 (87) International publication number: WO 2019/229432 (05.12.2019 Gazette 2019/49)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 30.05.2018 GB 201808840 31.05.2018 GB 201808960 12.10.2018 GB 201816688 22.10.2018 GB 201817199 (71) Applicant: Seach For The Next Ltd Nottingham NG7 2TU (GB)

(72) Inventors: SUMMERLAND, David Nottingham Nottinghamshire NG7 2TU (GB) LIGHT, Roger Nottingham Nottinghamshire NG7 2TU (GB) KNIGHT, Luke Nottingham Nottinghamshire NG7 2TU (GB) (74) Representative: Tolfree, Adam Joseph Benjamin et al Tolfree Patents & Trademarks Toll Drove Manea, Cambridgeshire PE15 0JX Manea, Cambridgeshire PE15 0JX (GB)